Update ssh-readme.md

doc/ssh-readme.md

@@ -24,14 +24,12 @@ automatically by C-Kermit.
   For convenience, you can create a file called `k95custom.ini` in the same
   directory as k95g.exe and place these commands there so that they're run
   automatically every time you start C-Kermit.
+* If you find your session disconnecting when left idle, try enabling the
+  heartbeat feature with the `set ssh heartbeat-interval` command.
 * The keyboard interactive authentication method doesn't seem to work so it's 
   disabled by default for now. See the *Supported Authentication Methods*
   section for more details.
 * Connecting through proxy servers is not currently supported
-* If no authentication methods are supported (eg, server only accepts public
-  key authentication and no key has been setup) you get the rather unhelpful
-  error message "Authentication failed - disconnecting" with no prompts or other
-  information.
 
 ## Supported Commands
 Only the following commands are implemented at this time. More will come in